[en] Kapton (polypyromellitimide) is used in space applications as an insulator, thermal blanket layer, substrate for solar cell arrays, and surface coatings. This report describes laboratory tests of kapton materials to investigate the erosion damage caused by simulated space radiation on those polymers. The tests were carried out at the McMaster University Tandem Accelerator Laboratory using protons and alpha particles at various energies, approach angles, and fluences. Samples tested were 7-millimeter squares 0.1 millimeter thick. Damage to specimens was measured by a weight loss technique. Results are presented and compared to those obtained using Monte Carlo simulation

[en] While accepted as part of critical infrastructure (CI) resilience, no consensus exists on how to measure the exact minimum level of service or the rapidity of rapidly restoring services. The H2020 European project IMPROVER (Improved risk evaluation and implementation of resilience concepts to critical infrastructure) suggests to use the public’s declared tolerance levels for both minimum level of service and rapidity of service restoration as criteria with which to evaluate if the resilience of a given CI is resilient enough. This paper demonstrates the development of a questionnaire-based methodology to determine public tolerance levels. It then tests this methodology via a pilot case study at IMPROVER’s Hungarian Highway Living Lab. The paper argues that public tolerance levels are a reasonable choice for resilience evaluation criteria and demonstrates that the questionnaire-based methodology permits one to evaluate public perception in such a way as to compare it to technical resilience analyses.

[en] Cumulative personal radiation dose data are presented obtained during the last decade of PNPP operation, with focus on 1992 data. The principles and criteria for establishing personal dosimetric measurements are presented, and the data obtained by official measurements using film dosimeters and data found by operative personnel dosimetry routines are compared. Maximum values of cumulated data observed during PNPP operation are analyzed. (N.T.) 6 figs.; 3 tabs

[en] The AN/UDM-1A calibrator consists of a 4.44 TBq ¹³⁷Cs radioisotopic source in a cylindrical lead shield. The most typical application of the unit is radiac meter calibration where predictable dose rate distributions are desired. However, vertically skewed dose rate distributions vertically from the exit window centre line have been measured, and an investigation was undertaken to determine the cause. It is demonstrated that MCNP models of a well-defined problem can be developed to predict the effect of inaccuracies in the as-built configuration when compared to blueprints. The causes of the skewness are presented as well as the mitigation methodology adopted. (author)

[en] Resolution and sensitivity of photoconducting light sensitive devices vary inversely with temperature. Hence it is desirable to provide cooling means for photoconductive radiation detectors. One type of low temperature photoconductor is fabricated by placing the photomultiplier tube in a double-walled vacuum Dewar flask. In another type, the detector is mounted near a cryogenic projection, or cold finger, emenating from a refrigerator. In this case fabrication is critical, and great care must be exercised when the cryogenic cold finger is inserted in the Dewar well in order to avoid breakage. A different solution herein to the problem provides detector not as prior devices to breakage of the Dewar detector wall

No abstract available

[en] GTP (guanosine-5'-triphosphate) markedly reduced high-affinity ³H-oxotremorine-M binding to M₂ receptors on brain slices in autoradiographic experiments while ³H-pirenzepine binding to M₁ receptors was largely unaffected. The distribution of M₁ receptors so labelled was also not altered by GTP to include former M₂-rich regions, thus indicating that GTP could not, by itself, interconvert high agonist-affinity M₂ receptors to M₁ receptors. 18 references, 1 figure

[en] In this document there ar exhibited indicators of the nuclear magnetic resonance realized during 2009, used in mastology, allowing a more precise test in the detection of breast cancer.

No abstract available

[en] In pituitary lactotrophs of female Sprague-Dawley rats given cysteamine (300 mg/kg, per os/day) for 7 days, forming granules were increased in number and contained many separate electron-dense structures suggesting crinophagy. Compared to control values, cysteamine treatment caused no change in blood prolactin (PRL) levels, measured by radioimmunoassay (RIA). 17 beta-Estradiol (50 micrograms, sc/day) for 7 days, induced lactotroph hyperplasia and increased blood PRL levels which were unaffected by simultaneous cysteamine administration. The ultrastructural changes did not reflect those due to bromocriptine suppression of secretory activity, and supported the concept that cysteamine altered lactotroph morphology by an unknown mechanism. In pituitary gonadotrophs following cysteamine treatment, increased electron lucency of luminal contents of dilated rough endoplasmic reticulum was noted; however, blood luteinizing hormone (LH) levels did not differ from those of control values. In ovariectomized rats, cysteamine suppressed castration cell formation and reduced blood LH levels, suggesting an interference with the cell's ability to respond to GnRH stimulation. The morphologic effects of cysteamine appeared to be selective to lactotrophs and gonadotrophs, and were not secondary to vascular impairment, as capillary endothelial cells were undamaged